Question

Film formed from electrolytic treatment is usually <1 μm thick.

(a) True

(b) False

I got this question in an interview for internship.

I'm obligated to ask this question of Manufacture of Tinplate in section Metal Packaging Materials of Food Packaging Technology

Answer 1

The correct option is (a) True

To explain I would say: The given statement is true. An electrolytic treatment in a sodium dichromate electrolyte is the most widespread. It results in the formation of a film (usually <1 μm thick), consisting of chromium, chromium oxides and tin oxides, the quantity and form of these basic constituents determining the varying properties of the film.